PTC 6 Flow Nozzle Meter
Our PTC flow nozzle meters are high-performance differential-producing flow measurement devices used as the primary element for steam turbine acceptance tests.
The meters are specifically manufactured in accord with the requirements of the ASME Performance Test Code 6 (PTC6) for steam turbines.
Nozzles are available in flanged and weld-in styles, and feature interior surfaces that are precision machined for cylindricality and a hydraulically-smooth surface. For weld-in flow nozzles, a code-recommended inspection port with a removable, contoured plug is available.
ASME PTC-6 Flow Nozzle
± 0.25% Always Calibrated
Highest Accuracy / Repeatability
- Line Size: 4” to 28”
- Head Loss % of Differential: 60% to 85% beta dependent
- Recommended Application, THROAT Reynolds Number: Greater than 500,000
ASME Long Radius Flow Nozzle
± 2.00% Uncalibrated Uncertainty
Liquids and Gases, High-Velocity Flow
- Line Size: 2” to 24”
- Head Loss % of Differential: 30% to 85% beta dependent
- Recommended Pipe Reynolds Number: Greater than 10,000
ASME PTC 19.5 Throat Tap Flow Nozzle
± 0.70% Uncalibrated Uncertainty
High Accuracy
- Line Size: 4” to 28”
- Head Loss % of Differential: 60% to 85% beta dependent
- Recommended Application, THROAT Reynolds Number: Greater than 500,000
ISA 1932 Flow Nozzle
± 0.80% to 1.20% Uncalibrated Uncertainty
Liquids & Gases, Lower Uncertainty
- Line Size: 2” to 20”
- Head Loss % of Differential: 30% to 85% beta dependent
- Recommended Minimum Pipe Reynolds Number: Greater than 20,000
Venturi Nozzle
± 1.21% to 1.74% Uncalibrated Uncertainty
Liquids and Gases, Lower Loss
- Line Size: 2.5” to 20”
- Head Loss % of Differential: 5% to 20%
- Recommended Pipe Reynolds Number: Greater than 150,000